Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
Verified with Windows 11 25H2 — updated on July 16, 2026
Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Microsoft Defender Application Guard Description
This policy setting allows certain device level Root Certificates to be shared with the Microsoft Defender Application Guard container. If you enable this setting, certificates with a thumbprint matching the ones specified will be transferred into the container. Multiple certificates can be specified by using a comma to separate the thumbprints for each certificate you want to transfer. If you disable or don’t configure this setting, certificates are not shared with the Microsoft Defender Application Guard container. Example: b4e72779a8a362c860c36a6461f31e3aa7e58c14,1b1d49f06d2a697a544a1059bd59a7b058cda924
Registry
HKLM
SOFTWARE\Policies\Microsoft\AppHVSI Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
; State: Enabled
; Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\AppHVSI]
"CertificateThumbprints"=""More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'CertificateThumbprints' -Value '' -Type StringIntune XML
No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI' -Name 'CertificateThumbprints' -Expected '' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'CertificateThumbprints' -Value '' -Type StringSCCM scripts
# Exported from gporais.com
# Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI' -Name 'CertificateThumbprints' -Expected '' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow Microsoft Defender Application Guard to use Root Certificate Authorities from the user’s device
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'CertificateThumbprints' -Value '' -Type StringBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.